What To Do? Not an Easy Question.

I had an appointment with my neurologist on the 8th of November. We talked about my MS progressing and how my current medicine, a shot I take every other day is not working like it should. My eyes continue to get worse, the pain, double vision, and blurriness. He would like to put me on a new med, in which I would receive an infusion once a month. The poblem is this med attacks the white blood cells, that are attacking the protective coating of the nerves in the brain and spine.  My immune system will be compromised, and have a greater chance of getting PML, a rare brain infection, that can be deadly. So, needless to say, all of this has been waying on my mind. Need some prayers, for guidance.